RT Journal Article SR Electronic T1 Maximal aerobic power—a longitudinal analysis JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 140 OP 140 DO 10.1136/bjsm.21.3.140-b VO 21 IS 3 A1 David A. Brodie YR 1987 UL http://bjsm.bmj.com/content/21/3/140.3.abstract AB